From this thread...http://us.battle.net/d3/en/forum/topic/14609910878
Blizzard said the chance to get a leg would go up, but never mentioned you should get more legendaries per bloodshard
yeah i experience more legendarys per 500 shards than i ever did before the patch.
but it is all luck based so you can have a shit string of luck and only get 1 or none for 500 shards, but you can also get 6 or 7..